The EVENTLOGRECORD structure contains information about an event record.
typedef struct _EVENTLOGRECORD { // evlr DWORD Length; DWORD Reserved; DWORD RecordNumber; DWORD TimeGenerated; DWORD TimeWritten; DWORD EventID; WORD EventType; WORD NumStrings; WORD EventCategory; WORD ReservedFlags; DWORD ClosingRecordNumber; DWORD StringOffset; DWORD UserSidLength; DWORD UserSidOffset; DWORD DataLength; DWORD DataOffset; // // Then follow: // // TCHAR SourceName[] // TCHAR Computername[] // SID UserSid // TCHAR Strings[] // BYTE Data[] // CHAR Pad[] // DWORD Length; // } EVENTLOGRECORD;
Value |
Meaning |
EVENTLOG_ERROR_TYPE |
Error event |
EVENTLOG_WARNING_TYPE |
Warning event |
EVENTLOG_INFORMATION_TYPE |
Information event |
EVENTLOG_AUDIT_SUCCESS |
Success Audit event |
EVENTLOG_AUDIT_FAILURE |
Failure Audit event |
For more information about event types, see Event
Logging.
The defined members are followed by the replacement strings for the message identified by the event identifier, the binary information, some pad bytes to make sure the full entry is on a DWORD boundary, and finally the length of the log entry again. Because the strings and the binary information can be of any length, no structure members are defined to reference them.
The event identifier together with SourceName and a language identifier identify a message string that describes the event in more detail. The strings are used as replacement strings and are merged into the message string to make a complete message. The message strings are contained in a message file specified in the source entry in the registry.
The binary information is information that is specific to the event. It could be the contents of the processor registers when a device driver got an error, a dump of an invalid packet that was received from the network, a dump of all the structures in a program (when the data area was detected to be corrupt), and so on. This information should be useful to the writer of the device driver or the application in tracking down bugs or unauthorized breaks into the application.
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